1
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Vázquez H. Toward Density-Functional Theory-Based Structure-Conductance Relationships in Single Molecule Junctions. J Phys Chem Lett 2022; 13:9326-9331. [PMID: 36178209 DOI: 10.1021/acs.jpclett.2c02349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
A method is presented that allows for the calculation using density functional theory (DFT) of the tunneling conductance of single molecule junctions for thousands of junction structures. With a single scaling parameter, conductance is evaluated from clusters consisting of the molecule bonded to one Au atom at each end. Junction geometries are obtained without any constraints from ab initio molecular dynamics simulations at room temperature. This method accurately reproduces standard DFT-based conductance values for several molecular and electrode structures while reducing the computational cost by a factor of ∼400×, allowing for the conductance of tens of thousands of geometries to be computed. When applied to a pair of conjugated molecules, these large data sets quantify the effect on conductance of molecular structure or quantum chemical properties. This methodology enables reliable DFT-based conductance calculations at a negligible computational cost and opens the way to quantitative structure-conductance relationships.
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Affiliation(s)
- Héctor Vázquez
- Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, PragueCZ-162 00, Czech Republic
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2
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Mitra G, Delmas V, Al Sabea H, Norel L, Galangau O, Rigaut S, Cornil J, Costuas K, Scheer E. Electronic transport through single-molecule oligophenyl-diethynyl junctions with direct gold-carbon bonds formed at low temperature. NANOSCALE ADVANCES 2022; 4:457-466. [PMID: 36132702 PMCID: PMC9419624 DOI: 10.1039/d1na00650a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 11/27/2021] [Indexed: 06/16/2023]
Abstract
We report on the first systematic transport study of alkynyl-ended oligophenyl-diethynyl (OPA) single-molecule junctions with direct Au-C anchoring scheme at low temperature using the mechanically controlled break junction technique. Through quantitative statistical analysis of opening traces, conductance histograms and density functional theory studies, we identified different types of junctions, classified by their conductance and stretching behavior, for OPA molecules between Au electrodes with two to four phenyl rings. We performed inelastic electron tunneling spectroscopy and observed the excitation of Au-C vibrational modes confirming the existence of Au-C bonds at low temperature and compared the stability of molecule junctions upon mechanical stretching. Our findings reveal the huge potential for future functional molecule transport studies at low temperature using alkynyl endgroups.
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Affiliation(s)
- Gautam Mitra
- University of Konstanz, Department of Physics 78 457 Konstanz Germany
| | - Vincent Delmas
- Univ. Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226 F-35 000 Rennes France
| | - Hassan Al Sabea
- Univ. Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226 F-35 000 Rennes France
| | - Lucie Norel
- Univ. Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226 F-35 000 Rennes France
| | - Olivier Galangau
- Univ. Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226 F-35 000 Rennes France
| | - Stéphane Rigaut
- Univ. Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226 F-35 000 Rennes France
| | - Jérôme Cornil
- University of Mons, Laboratory for Chemistry of Novel Materials, Department of Chemistry Place du Parc 20 B-7000 Mons Belgium
| | - Karine Costuas
- Univ. Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226 F-35 000 Rennes France
| | - Elke Scheer
- University of Konstanz, Department of Physics 78 457 Konstanz Germany
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3
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Giguère A, Ernzerhof M. Extending the source-sink potential method to include electron-nucleus coupling. J Chem Phys 2021; 155:014110. [PMID: 34241400 DOI: 10.1063/5.0056336] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The source-sink potential (SSP) method provides a simple tool for the qualitative analysis of the conductance of molecular electronic devices, and often analytical expressions for the conductance can be obtained. Here, we extend the SSP approach to account for decoherent, inelastic electron transport by including the non-adiabatic coupling between the electrons and the nuclei in the molecule. This coupling results in contributions to electron transport that can modify the qualitative structure-conductance relationships that we unraveled previously with SSP. In the approach proposed, electron-nucleus interactions are treated starting from the harmonic approximation for the nuclei, using a non-perturbative approach to account for the non-adiabatic coupling. Our method qualitatively describes experimentally observed phenomena and allows for a simple analysis that often provides analytical formulas in terms of the physical parameters of the junction, e.g., vibrational energies, non-adiabatic coupling, and molecule-contact coupling.
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Affiliation(s)
- Alexandre Giguère
- Département de Chimie, Université de Montréal, C.P. 6128 Succursale A, Montréal, Québec H3C 3J7, Canada
| | - Matthias Ernzerhof
- Département de Chimie, Université de Montréal, C.P. 6128 Succursale A, Montréal, Québec H3C 3J7, Canada
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4
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Haidar E, Tawfik SA, Stampfl C, Hirao K, Yoshizawa K, Nakajima T, Soliman KA, El‐Nahas AM. Attenuation of Redox Switching and Rectification in Azulenequinones/Hydroquinones after B and N Doping: A First‐Principles Investigation. ADVANCED THEORY AND SIMULATIONS 2020. [DOI: 10.1002/adts.202000203] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- El‐Abed Haidar
- School of Physics The University of Sydney Sydney NSW 2006 Australia
| | | | - Catherine Stampfl
- School of Physics The University of Sydney Sydney NSW 2006 Australia
| | - Kimihiko Hirao
- RIKEN Center for Computational Science 7‐1‐26 Minatojima‐minami, Chuo Kobe 650‐0047 Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering Kyushu University Nishi‐ku Fukuoka 819‐0395 Japan
| | - Takahito Nakajima
- RIKEN Center for Computational Science 7‐1‐26 Minatojima‐minami, Chuo Kobe 650‐0047 Japan
| | - Kamal A. Soliman
- Chemistry Department Faculty of Science Benha University Benha 13518 Egypt
| | - Ahmed M. El‐Nahas
- RIKEN Center for Computational Science 7‐1‐26 Minatojima‐minami, Chuo Kobe 650‐0047 Japan
- Chemistry Department Faculty of Science Menoufia University Shebin El‐Kom 32512 Egypt
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5
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Bhandari S, Yamada A, Hoskins A, Payne J, Aksu H, Dunietz BD. Achieving Predictive Description of Negative Differential Resistance in Molecular Junctions Using a Range‐Separated Hybrid Functional. ADVANCED THEORY AND SIMULATIONS 2020. [DOI: 10.1002/adts.202000016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Srijana Bhandari
- Department of Chemistry and Biochemistry Kent State University Kent OH 44242 USA
| | - Atsushi Yamada
- Department of Chemistry and Biochemistry Kent State University Kent OH 44242 USA
| | - Austin Hoskins
- Department of Chemistry and Biochemistry Kent State University Kent OH 44242 USA
| | - Jameson Payne
- Department of Chemistry and Biochemistry Kent State University Kent OH 44242 USA
| | - Huseyin Aksu
- Department of Chemistry and Biochemistry Kent State University Kent OH 44242 USA
- Department of Physics Canakkale Onsekiz Mart University Canakkale 17100 Turkey
| | - Barry D. Dunietz
- Department of Chemistry and Biochemistry Kent State University Kent OH 44242 USA
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6
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Yuan S, Wang S, Xu Z, Wang D, Zhao X, Ling Q, Wang Y. Effect of the linkage modes of thiolated ethynyl groups on the spin-dependent electronic transport properties in transition metal porphyrin molecular junctions. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 32:055301. [PMID: 31600737 DOI: 10.1088/1361-648x/ab4ca8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Using density functional theory and nonequilibrium Green's function method, the spin-dependent electronic transport properties of six transition metal porphyrin molecules (VP, CrP, MnP, FeP, CoP, and NiP), which are linked to gold electrodes through the thiolated ethynyl groups, are investigated. Two different linkage modes (beta linkage and meso linkage) of the substituted ethynyl groups on the porphyrin macrocycle are considered. The results show that the linkage mode of ethynyl groups plays an important role on the spin transport properties of the molecular junctions and the beta linkage is more favorable for the spin filtering efficiency of current than the meso linkages. The spin-up and spin-down energy levels show the different evolutions which is responsible for the difference of spin filtering efficiency between the two linkage modes. The computational results of total current show that the meso-linked molecular junctions have the better conductive performances than the beta-linked ones which may be caused by the different electronic transport paths.
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Affiliation(s)
- Shundong Yuan
- College of Science, China University of Petroleum, Qingdao 266580, People's Republic of China
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7
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Halle J, Néel N, Fonin M, Brandbyge M, Kröger J. Understanding and Engineering Phonon-Mediated Tunneling into Graphene on Metal Surfaces. NANO LETTERS 2018; 18:5697-5701. [PMID: 30044641 DOI: 10.1021/acs.nanolett.8b02295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Metal-intercalated graphene on Ir(111) exhibits phonon signatures in inelastic electron tunneling spectroscopy with strengths that depend on the intercalant. Extraordinarily strong graphene phonon signals are observed for Cs intercalation. Li intercalation likewise induces clearly discriminable phonon signatures, albeit less pronounced than observed for Cs. The signal can be finely tuned by the alkali metal coverage and gradually disappears upon increasing the junction conductance from tunneling to contact ranges. In contrast to Cs and Li, for Ni-intercalated graphene the phonon signals stay below the detection limit in all transport ranges. Going beyond the conventional two-terminal approach, transport calculations provide a comprehensive understanding of the subtle interplay between the graphene-electrode coupling and the observation of graphene phonon spectroscopic signatures.
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Affiliation(s)
- Johannes Halle
- Institut für Physik, Technische Universität Ilmenau , D-98693 Ilmenau , Germany
| | - Nicolas Néel
- Institut für Physik, Technische Universität Ilmenau , D-98693 Ilmenau , Germany
| | - Mikhail Fonin
- Fachbereich Physik , Universität Konstanz , D-78457 Konstanz , Germany
| | - Mads Brandbyge
- Center for Nanostructured Graphene, Department of Micro- and Nanotechnology , Technical University of Denmark , DK-2800 Kongens Lyngby , Denmark
| | - Jörg Kröger
- Institut für Physik, Technische Universität Ilmenau , D-98693 Ilmenau , Germany
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8
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Thoss M, Evers F. Perspective: Theory of quantum transport in molecular junctions. J Chem Phys 2018; 148:030901. [DOI: 10.1063/1.5003306] [Citation(s) in RCA: 105] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Michael Thoss
- Institute of Physics, University of Freiburg, Hermann-Herder-Str. 3, D-79104 Freiburg, Germany
| | - Ferdinand Evers
- Institute of Theoretical Physics, University of Regensburg, Universitätsstr. 31, D-93053 Regensburg, Germany
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9
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Sowa JK, Mol JA, Briggs GAD, Gauger EM. Environment-assisted quantum transport through single-molecule junctions. Phys Chem Chem Phys 2017; 19:29534-29539. [PMID: 29082390 DOI: 10.1039/c7cp06237k] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Single-molecule electronics has been envisioned as the ultimate goal in the miniaturisation of electronic circuits. While the aim of incorporating single-molecule junctions into modern technology still proves elusive, recent developments in this field have begun to enable experimental investigation of fundamental concepts within the area of chemical physics. One such phenomenon is the concept of environment-assisted quantum transport which has emerged from the investigation of exciton transport in photosynthetic complexes. Here, we study charge transport through a two-site molecular junction coupled to a vibrational environment. We demonstrate that vibrational interactions can significantly enhance the current through specific molecular orbitals. Our study offers a clear pathway towards finding and identifying environment-assisted transport phenomena in charge transport settings.
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Affiliation(s)
- Jakub K Sowa
- Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, UK.
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10
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Ueda A, Utsumi Y, Tokura Y, Entin-Wohlman O, Aharony A. AC transport and full-counting statistics of molecular junctions in the weak electron-vibration coupling regime. J Chem Phys 2017. [DOI: 10.1063/1.4973707] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Affiliation(s)
- A. Ueda
- Faculty of Pure and Applied Sciences, Division of Applied Physics, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan
| | - Y. Utsumi
- Department of Physics Engineering, Faculty of Engineering, Mie University, Tsu, Mie 514-8507, Japan
| | - Y. Tokura
- Faculty of Pure and Applied Sciences, Division of Physics, University of Tsukuba, Tsukuba 305-8573, Japan
| | - O. Entin-Wohlman
- Physics Department, Ben Gurion University, Beer Sheva 84105, Israel
- Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
| | - A. Aharony
- Physics Department, Ben Gurion University, Beer Sheva 84105, Israel
- Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
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11
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Leng J, Zhao L, Zhang Y, Ma H. Intermolecular interaction effect on the inelastic electron tunneling spectroscopy of bi-octane-monothiol junctions. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2016.11.051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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12
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Zhang L, Li X, Li H, Fan X. Theoretical studies on the electronic properties of alkyl chains. COMPUT THEOR CHEM 2016. [DOI: 10.1016/j.comptc.2016.04.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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13
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Xiang D, Wang X, Jia C, Lee T, Guo X. Molecular-Scale Electronics: From Concept to Function. Chem Rev 2016; 116:4318-440. [DOI: 10.1021/acs.chemrev.5b00680] [Citation(s) in RCA: 816] [Impact Index Per Article: 102.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Dong Xiang
- Beijing
National Laboratory for Molecular Sciences, State Key Laboratory for
Structural Chemistry of Unstable and Stable Species, College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, China
- Key
Laboratory of Optical Information Science and Technology, Institute
of Modern Optics, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071, China
| | - Xiaolong Wang
- Beijing
National Laboratory for Molecular Sciences, State Key Laboratory for
Structural Chemistry of Unstable and Stable Species, College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, China
| | - Chuancheng Jia
- Beijing
National Laboratory for Molecular Sciences, State Key Laboratory for
Structural Chemistry of Unstable and Stable Species, College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, China
| | - Takhee Lee
- Department
of Physics and Astronomy, and Institute of Applied Physics, Seoul National University, Seoul 08826, Korea
| | - Xuefeng Guo
- Beijing
National Laboratory for Molecular Sciences, State Key Laboratory for
Structural Chemistry of Unstable and Stable Species, College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, China
- Department
of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China
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14
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Xu X, Li W, Zhou X, Wang Q, Feng J, Tian WQ, Jiang Y. Theoretical study of electron tunneling through the spiral molecule junctions along spiral paths. Phys Chem Chem Phys 2016; 18:3765-71. [DOI: 10.1039/c5cp06726j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A theoretical study of electron transport in spiral-shaped molecules along spiral paths is executed by the first principles calculations.
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Affiliation(s)
- Xiaodong Xu
- Department of Physics
- Harbin Institute of Technology
- Harbin
- P. R. China
| | - Weiqi Li
- Department of Physics
- Harbin Institute of Technology
- Harbin
- P. R. China
| | - Xin Zhou
- Institute of Theoretical and Simulational Chemistry
- Academy of Fundamental and Interdisciplinary Sciences
- Harbin Institute of Technology
- Harbin
- P. R. China
| | - Qiang Wang
- Department of Applied Chemistry
- College of Science
- Nanjing Tech University
- Nanjing
- P. R. China
| | - Jikang Feng
- Institute of Theoretical Chemistry and College of Chemistry Jilin University
- Changchun
- P. R. China
| | - Wei Quan Tian
- College of Chemistry and Chemical Engineering
- Chongqing University
- Chongqing 400044
- P. R. China
| | - Yongyuan Jiang
- Department of Physics
- Harbin Institute of Technology
- Harbin
- P. R. China
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15
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Frisenda R, Perrin ML, van der Zant HSJ. Probing the local environment of a single OPE3 molecule using inelastic tunneling electron spectroscopy. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2015; 6:2477-2484. [PMID: 26885460 PMCID: PMC4734430 DOI: 10.3762/bjnano.6.257] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 12/09/2015] [Indexed: 06/05/2023]
Abstract
We study single-molecule oligo(phenylene ethynylene)dithiol junctions by means of inelastic electron tunneling spectroscopy (IETS). The molecule is contacted with gold nano-electrodes formed with the mechanically controllable break junction technique. We record the IETS spectrum of the molecule from direct current measurements, both as a function of time and electrode separation. We find that for fixed electrode separation the molecule switches between various configurations, which are characterized by different IETS spectra. Similar variations in the IETS signal are observed during atomic rearrangements upon stretching of the molecular junction. Using quantum chemistry calculations, we identity some of the vibrational modes which constitute a chemical fingerprint of the molecule. In addition, changes can be attributed to rearrangements of the local molecular environment, in particular at the molecule-electrode interface. This study shows the importance of taking into account the interaction with the electrodes when describing inelastic contributions to transport through single-molecule junctions.
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Affiliation(s)
- Riccardo Frisenda
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, Netherlands
| | - Mickael L Perrin
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, Netherlands
| | - Herre S J van der Zant
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, Netherlands
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16
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Ding Z, Sun Z, Li G, Meng F, Wu M, Ma Y, Chen X. The inelastic electron tunneling spectroscopy of curved finite-sized graphene nanoribbon based molecular devices. RSC Adv 2015. [DOI: 10.1039/c5ra09727d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The inelastic electron scattering properties of the molecular devices of curved finite-sized graphene nanoribbon (GNR) slices have been studied by combining the density functional theory and Green's function method.
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Affiliation(s)
- Zongling Ding
- School of Physics and Material Science
- Anhui University
- Hefei, China
- Co-operative Innovation Research Center for Weak Signal-Detecting Materials and Devices Integration
- Anhui University
| | - Zhaoqi Sun
- School of Physics and Material Science
- Anhui University
- Hefei, China
| | - Guang Li
- School of Physics and Material Science
- Anhui University
- Hefei, China
| | - Fanming Meng
- School of Physics and Material Science
- Anhui University
- Hefei, China
| | - Mingzai Wu
- School of Physics and Material Science
- Anhui University
- Hefei, China
| | - Yongqing Ma
- School of Physics and Material Science
- Anhui University
- Hefei, China
| | - Xiaoshuang Chen
- National Lab. of Infrared Physics
- Shanghai Institute for Technical Physics
- Chinese Academy of Sciences
- Shanghai, China
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17
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Chen CJ, Smeu M, Ratner MA. Modeling ion sensing in molecular electronics. J Chem Phys 2014; 140:054709. [DOI: 10.1063/1.4863860] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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18
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Ségerie A, Lin LL, Liégeois V, Luo Y, Champagne B. Effects of the basis set and of the exchange-correlation functional on the Inelastic Electron Tunneling signatures of 1,4-benzenedithiol. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 119:34-41. [PMID: 23831045 DOI: 10.1016/j.saa.2013.05.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Revised: 05/09/2013] [Accepted: 05/12/2013] [Indexed: 06/02/2023]
Abstract
The effects of the atomic basis set and of the exchange-correlation (XC) functional on the Inelastic Electron Tunneling (IET) spectra have been investigated by considering the prototypical 1,4-benzenedithiol molecule. These studies have been completed by tackling the reliability of the same methods for predicting the IR absorption spectrum of the same molecule. The main conclusions are (i) the B3LYP XC functional is suitable to predict the relative vibrational frequencies, (ii) provided a scaling factor is used, the root mean square error on the vibrational frequencies goes down to 18 cm(-1), (iii) triple-ζ basis sets and in particular the cc-pVTZ basis set is a good compromise between accuracy and computational needs, (iv) basis set effects on the IET intensities are larger than those of the XC functional, and (v) the cc-pVTZ, cc-pVQZ, and aug-cc-pVDZ basis sets provide consistent IET intensities.
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Affiliation(s)
- Audrey Ségerie
- Laboratoire de Chimie Théorique, Unité de Chimie Physique Théorique et Structurale, University of Namur, Rue de Bruxelles 61, B-5000 Namur, Belgium
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19
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Ségerie A, Liégeois V, Champagne B, Lin LL, Luo Y. Theoretical Insight into the Inelastic Electron Tunneling Spectra of an Anil Derivative. J Phys Chem A 2013; 117:12783-95. [DOI: 10.1021/jp408068d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Audrey Ségerie
- Laboratoire
de Chimie Théorique, University of Namur, rue de Bruxelles,
61, B-5000 Namur, Belgium
| | - Vincent Liégeois
- Laboratoire
de Chimie Théorique, University of Namur, rue de Bruxelles,
61, B-5000 Namur, Belgium
| | - Benoît Champagne
- Laboratoire
de Chimie Théorique, University of Namur, rue de Bruxelles,
61, B-5000 Namur, Belgium
| | - Li-Li Lin
- Department
of Theoretical Chemistry, School of Biotechnology, Royal Institute of Technology, S-10691 Stockholm, Sweden
| | - Yi Luo
- Department
of Theoretical Chemistry, School of Biotechnology, Royal Institute of Technology, S-10691 Stockholm, Sweden
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20
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Lykkebo J, Gagliardi A, Pecchia A, Solomon GC. Strong overtones modes in inelastic electron tunneling spectroscopy with cross-conjugated molecules: a prediction from theory. ACS NANO 2013; 7:9183-94. [PMID: 24067128 PMCID: PMC3807527 DOI: 10.1021/nn4037915] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Accepted: 09/19/2013] [Indexed: 05/31/2023]
Abstract
Cross-conjugated molecules are known to exhibit destructive quantum interference, a property that has recently received considerable attention in single-molecule electronics. Destructive quantum interference can be understood as an antiresonance in the elastic transmission near the Fermi energy and leading to suppressed levels of elastic current. In most theoretical studies, only the elastic contributions to the current are taken into account. In this paper, we study the inelastic contributions to the current in cross-conjugated molecules and find that while the inelastic contribution to the current is larger than for molecules without interference, the overall behavior of the molecule is still dominated by the quantum interference feature. Second, an ongoing challenge for single molecule electronics is understanding and controlling the local geometry at the molecule-surface interface. With this in mind, we investigate a spectroscopic method capable of providing insight into these junctions for cross-conjugated molecules: inelastic electron tunneling spectroscopy (IETS). IETS has the advantage that the molecule interface is probed directly by the tunneling current. Previously, it has been thought that overtones are not observable in IETS. Here, overtones are predicted to be strong and, in some cases, the dominant spectroscopic features. We study the origin of the overtones and find that the interference features in these molecules are the key ingredient. The interference feature is a property of the transmission channels of the π system only, and consequently, in the vicinity of the interference feature, the transmission channels of the σ system and the π system become equally transmissive. This allows for scattering between the different transmission channels, which serves as a pathway to bypass the interference feature. A simple model calculation is able to reproduce the results obtained from atomistic calculations, and we use this to interpret these findings.
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Affiliation(s)
- Jacob Lykkebo
- Nano-Science Center and Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark
| | - Alessio Gagliardi
- Department of Electronic Engineering, Università di Roma “Tor Vergata”, Via del Politecnico 1, 00133 Rome, Italy
| | - Alessandro Pecchia
- Consiglio Nazionale delle Ricerche, ISMN, Via Salaria km 29.6, 00017 Monterotondo, Rome, Italy
| | - Gemma C. Solomon
- Nano-Science Center and Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark
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21
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Demir F, Kirczenow G. Inelastic tunneling spectroscopy of gold-thiol and gold-thiolate interfaces in molecular junctions: the role of hydrogen. J Chem Phys 2012; 137:094703. [PMID: 22957582 DOI: 10.1063/1.4748379] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
It is widely believed that when a molecule with thiol (S-H) end groups bridges a pair of gold electrodes, the S atoms bond to the gold and the thiol H atoms detach from the molecule. However, little is known regarding the details of this process, its time scale, and whether molecules with and without thiol hydrogen atoms can coexist in molecular junctions. Here, we explore theoretically how inelastic tunneling spectroscopy (IETS) can shed light on these issues. We present calculations of the geometries, low bias conductances, and IETS of propanedithiol and propanedithiolate molecular junctions with gold electrodes. We show that IETS can distinguish between junctions with molecules having no, one, or two thiol hydrogen atoms. We find that in most cases, the single-molecule junctions in the IETS experiment of Hihath et al. [Nano Lett. 8, 1673 (2008)] had no thiol H atoms, but that a molecule with a single thiol H atom may have bridged their junction occasionally. We also consider the evolution of the IETS spectrum as a gold STM tip approaches the intact S-H group at the end of a molecule bound at its other end to a second electrode. We predict the frequency of a vibrational mode of the thiol H atom to increase by a factor ~2 as the gap between the tip and molecule narrows. Therefore, IETS should be able to track the approach of the tip towards the thiol group of the molecule and detect the detachment of the thiol H atom from the molecule when it occurs.
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Affiliation(s)
- Firuz Demir
- Department of Physics, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada.
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22
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Demir F, Kirczenow G. Identification of the atomic scale structures of the gold-thiol interfaces of molecular nanowires by inelastic tunneling spectroscopy. J Chem Phys 2012; 136:014703. [DOI: 10.1063/1.3671455] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
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23
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Yan H, Bergren AJ, McCreery RL. All-Carbon Molecular Tunnel Junctions. J Am Chem Soc 2011; 133:19168-77. [DOI: 10.1021/ja206619a] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Haijun Yan
- National Institute for Nanotechnology, National Research Council Canada, Edmonton, Alberta, Canada
| | - Adam Johan Bergren
- National Institute for Nanotechnology, National Research Council Canada, Edmonton, Alberta, Canada
| | - Richard L. McCreery
- National Institute for Nanotechnology, National Research Council Canada, Edmonton, Alberta, Canada
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
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24
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Hihath J, Bruot C, Nakamura H, Asai Y, Díez-Pérez I, Lee Y, Yu L, Tao N. Inelastic transport and low-bias rectification in a single-molecule diode. ACS NANO 2011; 5:8331-8339. [PMID: 21932824 DOI: 10.1021/nn2030644] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Designing, controlling, and understanding rectification behavior in molecular-scale devices has been a goal of the molecular electronics community for many years. Here we study the transport behavior of a single molecule diode, and its nonrectifying, symmetric counterpart at low temperatures, and at both low and high biases to help elucidate the electron-phonon interactions and transport mechanisms in the rectifying system. We find that the onset of current rectification occurs at low biases, indicating a significant change in the elastic transport pathway. However, the peaks in the inelastic electron tunneling (IET) spectrum are antisymmetric about zero bias and show no significant changes in energy or intensity in the forward or reverse bias directions, indicating that despite the change in the elastic transmission probability there is little impact on the inelastic pathway. These results agree with first principles calculations performed to evaluate the IETS, which also allow us to identify which modes are active in the single molecule junction.
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Affiliation(s)
- Joshua Hihath
- The Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University School of Electrical, Energy and Computer Engineering, 1001 S. McAllister Avenue, Tempe, Arizona 85281-5801, United States
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25
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Molecular electronic junction transport: some pathways and some ideas. Top Curr Chem (Cham) 2011. [PMID: 21915776 DOI: 10.1007/128_2011_227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
When a single molecule, or a collection of molecules, is placed between two electrodes and voltage is applied, one has a molecular transport junction. We discuss such junctions, their properties, their description, and some of their applications. The discussion is qualitative rather than quantitative, and focuses on mechanism, structure/function relations, regimes and mechanisms of transport, some molecular regularities, and some substantial challenges facing the field. Because there are many regimes and mechanisms in transport junctions, we will discuss time scales, geometries, and inelastic scattering methods for trying to determine the properties of molecules within these junctions. Finally, we discuss some device applications, some outstanding problems, and some future directions.
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26
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Yuan S, Wang S, Mei Q, Ling Q, Wang L, Huang W. First-Principles Study of Rectification in Bis-2-(5-ethynylthienyl)ethyne Molecular Junctions. J Phys Chem A 2011; 115:9033-42. [PMID: 21718049 DOI: 10.1021/jp204161z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shundong Yuan
- Jiangsu Key Laboratory of Organic Electronics & Information Displays and Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210046, People's Republic of China
- College of Physics Science and Technology, China University of Petroleum, Dongying 257061, People's Republic of China
| | - Shiyan Wang
- College of Physics Science and Technology, China University of Petroleum, Dongying 257061, People's Republic of China
| | - Qunbo Mei
- Jiangsu Key Laboratory of Organic Electronics & Information Displays and Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210046, People's Republic of China
| | - Qidan Ling
- Jiangsu Key Laboratory of Organic Electronics & Information Displays and Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210046, People's Republic of China
- Fujian Key Laboratory of Polymer Materials and College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350108, People's Republic of China
| | - Lianhui Wang
- Jiangsu Key Laboratory of Organic Electronics & Information Displays and Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210046, People's Republic of China
- Laboratory of Advanced Materials, Fudan University, 2205 Songhu Road, Shanghai 200438, People's Republic of China
| | - Wei Huang
- Jiangsu Key Laboratory of Organic Electronics & Information Displays and Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210046, People's Republic of China
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27
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Liang YY, Chen H, Mizuseki H, Kawazoe Y. Gate-controlled current and inelastic electron tunneling spectrum of benzene: A self-consistent study. J Chem Phys 2011; 134:144113. [DOI: 10.1063/1.3571475] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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28
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Yuan S, Dai C, Weng J, Mei Q, Ling Q, Wang L, Huang W. Theoretical Studies of Electron Transport in Thiophene Dimer: Effects of Substituent Group and Heteroatom. J Phys Chem A 2011; 115:4535-46. [DOI: 10.1021/jp201038f] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shundong Yuan
- Jiangsu Key Laboratory of Organic Electronics & Information Displays and Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210046, Peopleʼs Republic of China
| | - Chunlei Dai
- Jiangsu Key Laboratory of Organic Electronics & Information Displays and Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210046, Peopleʼs Republic of China
| | - Jiena Weng
- Jiangsu Key Laboratory of Organic Electronics & Information Displays and Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210046, Peopleʼs Republic of China
| | - Qunbo Mei
- Jiangsu Key Laboratory of Organic Electronics & Information Displays and Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210046, Peopleʼs Republic of China
| | - Qidan Ling
- Jiangsu Key Laboratory of Organic Electronics & Information Displays and Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210046, Peopleʼs Republic of China
- Fujian Key Laboratory of Polymer Materials and College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350108, Peopleʼs Republic of China
| | - Lianhui Wang
- Jiangsu Key Laboratory of Organic Electronics & Information Displays and Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210046, Peopleʼs Republic of China
- Laboratory of Advanced Materials, Fudan University, 2205 Songhu Road, Shanghai 200438, Peopleʼs Republic of China
| | - Wei Huang
- Jiangsu Key Laboratory of Organic Electronics & Information Displays and Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210046, Peopleʼs Republic of China
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29
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Demir F, Kirczenow G. Communication: Identification of the molecule–metal bonding geometries of molecular nanowires. J Chem Phys 2011; 134:121103. [DOI: 10.1063/1.3571473] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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30
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Gorjizadeh N, Farajian AA, Kawazoe Y. Non-coherent transport in carbon chains. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2011; 23:075301. [PMID: 21411880 DOI: 10.1088/0953-8984/23/7/075301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The effect of electron-phonon (e-ph) interaction on the conductance of carbon chains is investigated by a non-equilibrium Green's function technique combined with a four-orbitals-per-atom tight-binding Hamiltonian. The optimized structure of the chain is found to be the semiconducting polyyne type (···-C≡C-C≡C-···). Our results show that the conductance of a carbon chain attached to two fixed contacts decreases due to e-ph interaction, and this reduction is stronger for longitudinal phonon modes which decrease the hopping energy between carbon atoms. Study of individual phonon modes reveals that emission of longitudinal phonons is stronger than that of transverse modes at room temperature, while absorption of transverse phonons is dominant. Conductance at finite temperature is also studied by considering the overall phonon effects; this shows that the reduction of the conductance is stronger at higher temperatures. The results are explained on the basis of the unique features of the carbon chain band structure.
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Affiliation(s)
- Narjes Gorjizadeh
- Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.
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31
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Fock J, Sørensen JK, Lörtscher E, Vosch T, Martin CA, Riel H, Kilså K, Bjørnholm T, van der Zant H. A statistical approach to inelastic electron tunneling spectroscopy on fullerene-terminated molecules. Phys Chem Chem Phys 2011; 13:14325-32. [DOI: 10.1039/c1cp20861f] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Das B. Bending of conjugated molecular wires and its effect on electron conduction properties. NANOTECHNOLOGY 2010; 21:395201. [PMID: 20820090 DOI: 10.1088/0957-4484/21/39/395201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The electronic structure and electron transport properties of simple conjugated molecular wires like oligophenylene ethynylene (OPE) and oligophenylene vinylene (OPV) are studied under compression. If artificially confined to a given shorter length, the oligomers tend to bend and bending causes a loss in the overlap of the conjugated molecular orbitals. Theoretical modeling of electronic transport has been carried out for all undistorted and compressed OPE/OPV oligomers. OPV exists in step-like or V-like conformations and they have the same stability with very similar frontier molecular orbitals. The conductances of these molecular wires are calculated when inserted between two gold probes and the conductances for OPV are found to be comparable to OPE when the interfaces are same. The conductance decreases with bending due to the gradual loss in overlap of the molecular orbitals. It is also found that the conductances of the molecular wires decrease very strongly if the terminal sulfur atom is simultaneously bonded to hydrogen and a gold surface, thus reflecting the importance of the interface in determining the conductance in two-probe systems. From the conductance studies it may be concluded that if one or more benzene rings of OPE are rotated from coplanar conditions, the orthogonal molecular orbitals may completely block the electronic transport, rendering the molecule insulating.
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Affiliation(s)
- Bidisa Das
- Center for Advanced Materials (CAM), Indian Association for the Cultivation of Science, Jadavpur, Kolkata, India.
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33
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Hihath J, Bruot C, Tao N. Electron-phonon interactions in single octanedithiol molecular junctions. ACS NANO 2010; 4:3823-3830. [PMID: 20553018 DOI: 10.1021/nn100470s] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We study the charge transport properties and electron-phonon interactions in single molecule junctions, each consisting of an octanedithiol molecule covalently bound to two electrodes. Conductance measurements over a wide temperature range establish tunneling as the dominant charge transport process. Inelastic electron tunneling spectroscopy performed on individual molecular junctions provides a chemical signature of the molecule and allows electron-phonon interaction induced changes in the conductance to be explored. By fitting the conductance changes in the molecular junction using a simple model for inelastic transport, it is possible to estimate the phonon damping rates in the molecule. Finally, changes in the inelastic spectra are examined in relation to conductance switching events in the junction to demonstrate how changes in the configuration of the molecule or contact geometry can affect the conductance of the molecular junction.
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Affiliation(s)
- Joshua Hihath
- Center for Bioelectronics and Biosensors, the Biodesign Institute, and Department of Electrical Engineering, Arizona State University, Tempe, Arizona 85287-5801, USA
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34
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Xing Y, Park TH, Venkatramani R, Keinan S, Beratan DN, Therien MJ, Borguet E. Optimizing Single-Molecule Conductivity of Conjugated Organic Oligomers with Carbodithioate Linkers. J Am Chem Soc 2010; 132:7946-56. [DOI: 10.1021/ja909559m] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yangjun Xing
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, Departments of Chemistry, Biochemistry, and Physics, Duke University, Durham, North Carolina 27708, and Department of Chemistry, French Family Science Center, Duke University, Durham, North Carolina 27708
| | - Tae-Hong Park
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, Departments of Chemistry, Biochemistry, and Physics, Duke University, Durham, North Carolina 27708, and Department of Chemistry, French Family Science Center, Duke University, Durham, North Carolina 27708
| | - Ravindra Venkatramani
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, Departments of Chemistry, Biochemistry, and Physics, Duke University, Durham, North Carolina 27708, and Department of Chemistry, French Family Science Center, Duke University, Durham, North Carolina 27708
| | - Shahar Keinan
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, Departments of Chemistry, Biochemistry, and Physics, Duke University, Durham, North Carolina 27708, and Department of Chemistry, French Family Science Center, Duke University, Durham, North Carolina 27708
| | - David N. Beratan
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, Departments of Chemistry, Biochemistry, and Physics, Duke University, Durham, North Carolina 27708, and Department of Chemistry, French Family Science Center, Duke University, Durham, North Carolina 27708
| | - Michael J. Therien
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, Departments of Chemistry, Biochemistry, and Physics, Duke University, Durham, North Carolina 27708, and Department of Chemistry, French Family Science Center, Duke University, Durham, North Carolina 27708
| | - Eric Borguet
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, Departments of Chemistry, Biochemistry, and Physics, Duke University, Durham, North Carolina 27708, and Department of Chemistry, French Family Science Center, Duke University, Durham, North Carolina 27708
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35
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Dash LK, Ness H, Godby RW. Nonequilibrium electronic structure of interacting single-molecule nanojunctions: Vertex corrections and polarization effects for the electron-vibron coupling. J Chem Phys 2010; 132:104113. [DOI: 10.1063/1.3339390] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Affiliation(s)
- L K Dash
- Department of Physics, University of York, York YO10 5DD, United Kingdom.
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36
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Yokota K, Taniguchi M, Kawai T. Molecular vibrations in metal–single-molecule–metal junctions. Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2010.01.034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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37
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Okabayashi N, Paulsson M, Ueba H, Konda Y, Komeda T. Inelastic tunneling spectroscopy of alkanethiol molecules: high-resolution spectroscopy and theoretical simulations. PHYSICAL REVIEW LETTERS 2010; 104:077801. [PMID: 20366914 DOI: 10.1103/physrevlett.104.077801] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2009] [Indexed: 05/29/2023]
Abstract
We investigate inelastic electron tunneling spectroscopy (IETS) for alkanethiol self-assembled monolayers (SAM) with a scanning tunneling microscope and compare it to first-principles calculations. Using a combination of partial deuteration of the molecule and high-resolution measurements, we identify and differentiate between methyl (CH3) and methylene (CH2) groups and their symmetric and asymmetric C-H stretch modes. The calculations agree quantitatively with the measured IETS in producing the weight of the symmetric and asymmetric C-H stretch modes while the methylene stretch mode is largely underestimated. We further show that inelastic intermolecular scattering is important in the SAM by plotting the theoretical current densities.
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Affiliation(s)
- Norio Okabayashi
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Sendai, 980-8577, Japan
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38
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Taniguchi M, Tsutsui M, Yokota K, Kawai T. Inelastic electron tunneling spectroscopy of single-molecule junctions using a mechanically controllable break junction. NANOTECHNOLOGY 2009; 20:434008. [PMID: 19801761 DOI: 10.1088/0957-4484/20/43/434008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We report the use of electrical measurements to identify simultaneously the number and type of organic molecules within metal-molecule-metal junctions. Our strategy combines analyses of single-molecule conductance and inelastic electron tunneling spectra, exploiting a nanofabricated mechanically controllable break junction. We found that the peak linewidth of the inelastic electron tunneling spectrum decreased as the modulation voltage and temperature decreased, and that the selection rule for inelastic electron tunneling spectroscopy agrees with that for Raman spectroscopy. Furthermore, the differential conductance curve of the single-molecule junction suggests that it has asymmetrical electrode-molecule coupling.
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Affiliation(s)
- Masateru Taniguchi
- The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka, Japan.
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39
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Kim WY, Choi YC, Min SK, Cho Y, Kim KS. Application of quantum chemistry to nanotechnology: electron and spin transport in molecular devices. Chem Soc Rev 2009; 38:2319-33. [DOI: 10.1039/b820003c] [Citation(s) in RCA: 112] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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40
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Green Function Techniques in the Treatment of Quantum Transport at the Molecular Scale. SPRINGER SERIES IN CHEMICAL PHYSICS 2009. [DOI: 10.1007/978-3-642-02306-4_9] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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41
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Jiang J, Kula M, Luo Y. Molecular modeling of inelastic electron transport in molecular junctions. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2008; 20:374110. [PMID: 21694417 DOI: 10.1088/0953-8984/20/37/374110] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A quantum chemical approach for the modeling of inelastic electron tunneling spectroscopy of molecular junctions based on scattering theory is presented. Within a harmonic approximation, the proposed method allows us to calculate the electron-vibration coupling strength analytically, which makes it applicable to many different systems. The calculated inelastic electron transport spectra are often in very good agreement with their experimental counterparts, allowing the revelation of detailed information about molecular conformations inside the junction, molecule-metal contact structures, and intermolecular interaction that is largely inaccessible experimentally.
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Affiliation(s)
- Jun Jiang
- Department of Theoretical Chemistry, School of Biotechnology, Royal Institute of Technology, S-106 91 Stockholm, Sweden
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42
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Troisi A. Inelastic electron tunnelling in saturated molecules with different functional groups: correlations and symmetry considerations from a computational study. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2008; 20:374111. [PMID: 21694418 DOI: 10.1088/0953-8984/20/37/374111] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The inelastic electron tunnelling (IET) spectra of a series of molecules with the commonest functional groups are evaluated computationally. It is found that ether, secondary amine and thioether groups do not leave any characteristic signatures on the IET spectrum (in comparison with simple alkanes) and they cannot be used as 'tracers' for the tunnelling path of the electron. In contrast, carbonyl and ester groups modify the appearance of the IET spectrum considerably. The series of computations was also used to validate, for the case of saturated molecules, the propensity rules for IET spectroscopy proposed in the literature. It is found that totally symmetric vibrations give the largest contribution to the spectrum and that there is no correlation between IET and infrared or Raman absorption intensities.
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Affiliation(s)
- Alessandro Troisi
- Department of Chemistry and Centre of Scientific Computing, University of Warwick, Coventry CV4 7AL, UK
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43
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Liu H, Wang N, Zhao J, Guo Y, Yin X, Boey FYC, Zhang H. Length-dependent conductance of molecular wires and contact resistance in metal-molecule-metal junctions. Chemphyschem 2008; 9:1416-24. [PMID: 18512822 DOI: 10.1002/cphc.200800032] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Molecular wires are covalently bonded to gold electrodes--to form metal-molecule-metal junctions--by functionalizing each end with a -SH group. The conductance of a wide variety of molecular junctions is studied theoretically by using first-principles density functional theory (DFT) combined with the nonequilibrium Green's function (NEGF) formalism. Based on the chain-length-dependent conductance of the series of molecular wires, the attenuation factor beta is obtained and compared with the experimental data. The beta value is quantitatively correlated to the molecular HOMO-LUMO gap. Coupling between the metallic electrode and the molecular bridge plays an important role in electron transport. A contact resistance of 6.0+/-2.0 Kohms is obtained by extrapolating the molecular-bridge length to zero. This value is of the same magnitude as the quantum resistance.
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Affiliation(s)
- Hongmei Liu
- Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210008, PR China
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44
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Paulsson M, Frederiksen T, Ueba H, Lorente N, Brandbyge M. Unified description of inelastic propensity rules for electron transport through nanoscale junctions. PHYSICAL REVIEW LETTERS 2008; 100:226604. [PMID: 18643440 DOI: 10.1103/physrevlett.100.226604] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2007] [Indexed: 05/26/2023]
Abstract
We present a method to analyze the results of first-principles based calculations of electronic currents including inelastic electron-phonon effects. This method allows us to determine the electronic and vibrational symmetries in play, and hence to obtain the so-called propensity rules for the studied systems. We show that only a few scattering states--namely those belonging to the most transmitting eigenchannels--need to be considered for a complete description of the electron transport. We apply the method on first-principles calculations of four different systems and obtain the propensity rules in each case.
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Affiliation(s)
- Magnus Paulsson
- Division of Physics, School of Pure and Applied Natural Science, University of Kalmar, 391 82 Kalmar, Sweden.
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45
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Okabayashi N, Konda Y, Komeda T. Inelastic electron tunneling spectroscopy of an alkanethiol self-assembled monolayer using scanning tunneling microscopy. PHYSICAL REVIEW LETTERS 2008; 100:217801. [PMID: 18518634 DOI: 10.1103/physrevlett.100.217801] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2008] [Indexed: 05/26/2023]
Abstract
We report inelastic electron tunneling spectroscopy (IETS) of a C8 alkanethiol self-assembled monolayer using a scanning tunneling microscope (STM). High-resolution STM IETS spectra show clear features of the C-H bending and C-C stretching modes in addition to the C-H stretching mode, which enables a precise comparison with previously reported vibrational spectroscopy, especially electron energy loss spectroscopy data. Intensity variation of vibrational peaks with tip position is discussed with the STM IETS detection mechanism.
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Affiliation(s)
- Norio Okabayashi
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, 980-0877, Japan
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46
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Galperin M, Ratner MA, Nitzan A, Troisi A. Nuclear Coupling and Polarization in Molecular Transport Junctions: Beyond Tunneling to Function. Science 2008; 319:1056-60. [DOI: 10.1126/science.1146556] [Citation(s) in RCA: 255] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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47
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Bredow T, Tegenkamp C, Pfnür H, Meyer J, Maslyuk VV, Mertig I. Ferrocene-1,1′-dithiol as molecular wire between Ag electrodes: The role of surface defects. J Chem Phys 2008; 128:064704. [DOI: 10.1063/1.2827867] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kula M, Luo Y. Effects of intermolecular interaction on inelastic electron tunneling spectra. J Chem Phys 2008; 128:064705. [DOI: 10.1063/1.2832304] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Zhou YX, Jiang F, Chen H, Note R, Mizuseki H, Kawazoe Y. First-principles study of length dependence of conductance in alkanedithiols. J Chem Phys 2008; 128:044704. [DOI: 10.1063/1.2827868] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Nakamura H, Yamashita K. Systematic study on quantum confinement and waveguide effects for elastic and inelastic currents in atomic gold wire: importance of the phase factor for modeling electrodes. NANO LETTERS 2008; 8:6-12. [PMID: 18081352 DOI: 10.1021/nl071281c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Quantum confinement of the electrodes is an important issue for electron transport through molecular or atomic wire junctions. To assess the importance of waveguide effects by quantum confinement of the electrodes, we have calculated elastic and inelastic conductance and inelastic electron tunneling spectra of atomic gold wire with gold electrodes for several models. The results show the quite important role of the phase factors between the modeled electrodes and the contact region.
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Affiliation(s)
- Hisao Nakamura
- Department of Chemical System Engineering, Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan.
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